Mitsubishi Outlander (2013+). Manual - part 446

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-27

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the CAN bus lines (Refer to GROUP 
54C 

− CAN Bus Diagnostics Table ).On 

completion, go to Step 2.

STEP 2. Diagnosis code recheck after resetting 
CAN bus lines

Q: Is the relevant diagnosis code set?

YES : 

Go to Step 3.

NO : 

This diagnosis is complete.

STEP 3. Check whether the diagnosis code is 
reset.
Erase the diagnosis code.

Q: Is the relevant diagnosis code set?

YES : 

Replace the hydraulic unit (integrated with 

ABS-ECU) (Refer to 

P.35B-61

). Then go to 

Step 4.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use Troubleshooting/ How to 

Cope with Intermittent Malfunctions ).

STEP 4. Check whether the diagnosis code is 
reset.
Erase the diagnosis code.

Q: Is the relevant diagnosis code set?

YES : 

Return to Step 1.

NO : 

This diagnosis is complete.

Code No. C2104 Valve power supply circuit

CAUTION

If there is any problem in the CAN bus lines, an 
incorrect diagnosis code may be set. Prior to this 
diagnosis, diagnose the CAN bus lines (Refer to 
GROUP 54C 

− CAN Bus Diagnostics Table ).

OPERATION

• ABS-ECU contains the power supply circuit (+BV 

terminal) for the solenoid valve. The solenoid 
valve is energised by the valve relay, which is 
incorporated in ABS-ECU.

• The valve relay, which is incorporated in 

ABS-ECU, is always energising the solenoid 
valve unless the initial check is in progress when 
the ignition switch is turned on, and the recurrent 
system check is in progress.

DIAGNOSIS CODE SET CONDITIONS

This diagnosis code will be set when the solenoid 
valve supply voltage is not within the standard value.

PROBABLE CAUSES

Current trouble

• Fusible link malfunction

• Damaged wiring harness and connectors

• Abnormality in battery or alternator

• ABS-ECU malfunction

Past trouble

• Carry out diagnosis with particular emphasis on 

wiring harness and connector failures between 
the power supply circuit (+BV terminal) to 
ABS-ECU solenoid valve or earth circuit (GND1, 
GND2 terminal). For diagnosis procedures, refer 
to How to treat past trouble (GROUP 00 

− How to 

Use Troubleshooting/How to Treat Past Trouble ).

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the CAN bus lines (Refer to GROUP 
54C 

− CAN Bus Diagnostics Table ). On 

completion, go to Step 2.

STEP 2. Diagnosis code recheck after resetting 
CAN bus lines

Q: Is the diagnosis code No.C2104 set?

YES : 

Go to Step 3.

NO : 

This diagnosis is complete.

STEP 3. Battery check
Refer to GROUP 54A 

− Battery Test .

Q: Is the battery in good condition?

YES : 

Go to Step 4.

NO : 

Replace the battery. Then go to Step 10.

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-28

STEP 4. Charging system check
Refer to GROUP 16 

− On−vehicle Service/Alternator 

Output Line Voltage Drop Test .

Q: Is the charging system in good condition?

YES : 

Go to Step 5.

NO : 

Repair or replace the charging system 
component(s). Then go to Step 10.

STEP 5. Fusible link check: Check the fusible link 
No.4 and SBF7.
Visually check for open circuit in the fusible link No.4 
and SBF7.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Go to Step 6.

STEP 6. Resistance measurement at ABS-ECU 
connector
(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Disconnect the fusible link No.SBF7.
(3) Resistance between the +BV terminal and the 

body earth.

OK: No continuity

Q: Is the check result normal?

YES : 

Replace the fusible link No.4 or SBF7. Then 

go to Step 10.

NO : 

The short circuit may be present in the 
power supply circuit. Repair the wiring 
harness between the ABS-ECU connector 
+BV terminal and the fusible link, and then 
replace the fusible link No.4 or SBF7. Then 
go to Step 10.

STEP 7. Voltage measurement at the ABS-ECU 
connector
(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Measure the voltage between the +BV terminal 

and the body earth.

OK: Approximately system voltage

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

The open circuit may be present in the 
power supply circuit. Repair the wiring 
harness between the ABS-ECU connector 
+BV terminal and the fusible link. Then go to 
Step 10.

STEP 8. Resistance measurement at ABS-ECU 
connector
(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Resistance between the GND1 terminal and the 

body earth, and between the GND2 terminal and 
the body earth

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

An open circuit may be present in the earth 
circuit. Repair the wiring harness between 
the ABS-ECU connector GND1 terminal and 
the body earth, and between the ASC-ECU 
connector GND2 terminal and the body 
earth. Then go to Step 10.

STEP 9. Check whether the diagnosis code is 
reset.
Erase the diagnosis code.

Q: Is the diagnosis code No.C2104 set?

YES : 

Replace the hydraulic unit (integrated with 

ABS-ECU) (Refer to 

P.35B-61

). Then go to 

Step 10.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use Troubleshooting/ How to 

Cope with Intermittent Malfunctions ).

STEP 10. Check whether the diagnosis code is 
reset.
Erase the diagnosis code.

Q: Is the diagnosis code No.C2104 set?

YES : 

Return to Step 1.

NO : 

This diagnosis is complete.

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-29

Code No. C1073 Motor drive circuit

CAUTION

If there is any problem in the CAN bus lines, an 
incorrect diagnosis code may be set. Prior to this 
diagnosis, diagnose the CAN bus lines (Refer to 
GROUP 54C 

− CAN Bus Diagnostics Table ).

OPERATION

• ABS-ECU contains the power supply circuit (+BM 

terminal) for the pump motor. The pump motor is 
energised by the motor switch, which is incorpo-
rated in ABS-ECU.

• The pump motor switch, which is incorporated in 

ABS-ECU, is always off unless the ABS operating 
and the motor solenoid valve check is activated 
when the vehicle is started.

• ABS-ECU activates the pump motor by turning 

on the ECU built-in pump motor switch.

DIAGNOSIS CODE SET CONDITIONS

If the pump motor switch voltage drop indicates high 
value when the pump motor operates or after the 
operation, the pump motor operation is stopped and 
this diagnosis code is set.

PROBABLE CAUSES

Current trouble

• Fusible link malfunction

• Damaged wiring harness and connectors

• Abnormality in battery or alternator

• ABS-ECU malfunction

Past trouble

• Carry out diagnosis with particular emphasis on 

wiring harness and connector failures between 
the power supply circuit (+BM terminal) to the 
ABS-ECU motor and the earth circuit (GND1, 
GND2 terminal). For diagnosis procedures, refer 
to How to treat past trouble (GROUP 00 

− How to 

Use Troubleshooting/How to Treat Past Trouble ).

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the CAN bus lines (Refer to GROUP 
54C 

− CAN Bus Diagnostics Table ). On 

completion, go to Step 2.

STEP 2. Check whether the diagnosis code is 
reset.

Q: Is the diagnosis code No.C1073 set?

YES : 

Go to Step 3.

NO : 

This diagnosis is complete.

STEP 3. Battery check
Refer to GROUP 54A 

− Battery Test .

Q: Is the battery in good condition?

YES : 

Go to Step 4.

NO : 

Replace the battery. Then go to Step 10.

STEP 4. Charging system check
Refer to GROUP 16 

− On−vehicle Service/Alternator 

Output Line Voltage Drop Test .

Q: Is the charging system in good condition?

YES : 

Go to Step 5.

NO : 

Repair or replace the charging system 
component(s). Then go to Step 10.

STEP 5. Fusible link check: Check the fusible link 
No.4 and SBF5.
Visually check for open circuit in the fusible link No.4 
and SBF5.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Go to Step 6.

STEP 6. Resistance measurement at ABS-ECU 
connector
(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Resistance between the +BM terminal and the 

body earth.

OK: No continuity

Q: Is the check result normal?

YES : 

Replace the fusible link No.4 or SBF5. Then 

go to Step 10.

NO : 

The short circuit may be present in the 
power supply circuit. Repair the wiring 
harness between the ABS-ECU connector 
+BM terminal and the fusible link, and then 
replace the fusible link No.4 or SBF5. Then 
go to Step 10.

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-30

STEP 7. Voltage measurement at the ABS-ECU 
connector
(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Measure the voltage between the +BM terminal 

and the body earth.

OK: Approximately system voltage

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

The open circuit may be present in the 
power supply circuit. Repair the wiring 
harness between the ABS-ECU connector 
+BM terminal and the fusible link. Then go 
to Step 10.

STEP 8. Resistance measurement at ABS-ECU 
connector
(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Resistance between the GND1 terminal and the 

body earth, and between the GND2 terminal and 
the body earth

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

An open circuit may be present in the earth 
circuit. Repair the wiring harness between 
the ABS-ECU connector GND1 terminal and 
the body earth, and between the ABS-ECU 
connector GND2 terminal and the body 
earth. Then go to Step 10.

STEP 9. Check whether the diagnosis code is 
reset.
(1) Erase the diagnosis code.
(2) Drive the vehicle at 20 km/h or more.

NOTE: The ABS warning lamp does not turn OFF 
in some cases unless the vehicle runs at 20 km/h 
or higher.

Q: Is the diagnosis code No.C1073 set?

YES : 

Replace the hydraulic unit (integrated with 

ABS-ECU) (Refer to 

P.35B-61

). Then go to 

Step 10.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use Troubleshooting/How to 

Cope with Intermittent Malfunctions ).

STEP 10. Check whether the diagnosis code is 
reset.
(1) Erase the diagnosis code.
(2) Drive the vehicle at 20 km/h or more.

NOTE: The ABS warning lamp does not turn OFF 
in some cases unless the vehicle runs at 20 km/h 
or higher.

Q: Is the diagnosis code No.C1073 set?

YES : 

Return to Step 1.

NO : 

This diagnosis is complete.

Code No. C2116 Pump motor voltage low

CAUTION

• If there is any problem in the CAN bus lines, 

an incorrect diagnosis code may be set. Prior 
to this diagnosis, diagnose the CAN bus lines 
(Refer to GROUP 54C 

− CAN Bus Diagnostics 

Table ).

• Whenever ECU is replaced, ensure that the 

CAN bus lines are normal.

OPERATION

• ABS-ECU contains the power supply circuit (+BM 

terminal) for the pump motor. The pump motor is 
energised by the motor switch, which is incorpo-
rated in ABS-ECU.

• The pump motor switch, which is incorporated in 

ABS-ECU, is always off unless the motor sole-
noid valve check is activated when the vehicle is 
started.

• ABS-ECU activates the pump motor by turning 

on the ECU built-in pump motor switch.

DIAGNOSIS CODE SET CONDITIONS

This diagnosis codes will be set under the cases 
below:

• When the power supply voltage of the pump 

motor, which is not in operation, is abnormally low 
for a prolonged period

• When the power supply voltage of the pump 

motor, which is not in operation, is abnormally 
high for a prolonged period